Raymond x



R. 0. JOHNSON.

VALVE.

APPLICATION FILED JUNE 1.6. I916.

1 32 1 7 5 l Patented Nov. 11, 1919.v

RAYMOND D. JOHNSON, OF NEW YORK, N. Y.

. VALVE.

Specification of Letters Patent. Patented NOV. 11, 1919.

Application filed June 16 1916. Serial No. 104,062.

T all whom it may concern:

Be it known that I, RAYMOND D. J or IN- sox, a citizen of the United States, residing at New York, in the county of New York means for maintainin the closure portion or plunger of the valve in the fully open position, this feature relating particularly to valves which are vertically arranged. Another feature relates to a simple and effective means for indicating at the exterior of the casing the position of the plunger.

The manner in which I provide for these improvements will fully appear in the accompanying specification and drawings in which- Figure 1, is a longitudinal vertical section of the valve, the a pipe connections being shown diagrammatically;

Fig. 2, is a detail showing the manner in which the indicator shaft is mounted; and

Fig. 3, is a detail of one means for producing a water tight joint between the top of the plunger and the casing. 1

Referring to the drawings, 1 represents a fluid conduit which will for illustration be assumed to serve for conveying water under pressure. 3 is an enlargement of the conduit and having a radually expanding portion 2 Mounted within this chamber and spaced from the walls thereof isa cylindrical chamber 4 havin a closed conical nose 5. The cylinder 4 is rigidly held in central position by a series-of radial ribs 6. Sliding within the cylinder 4 is a plunger 7, also having a conical nose 8, both the noses having such aconfiguration as to subdivide, the fluid smoothly as it enters and leaves the valve. The nose 8 is provided with a closure surface properly shaped to cooperate with of the ribs 6 forming a corresponding valve seat 31. The ribs 6 are extended beyond the end of the cylinder 4 to the wall of the casing 3, the inner edges guides which provide a sliding surface and support for the plunger, all the way to its seat 31.0n the inner wall of the casing 3. The cylinder 4 and plunger 7 areas shown in Fig.1, so shaped as to form an annular chamber A within the operating cylinder 4 in addition to the central chamber B. By means of a suitable external control. valve and piping, either plpe-line pressure or atmospheric pressure may be applied in the chambers A and B. Admltting pipe line pressure to A and exhausting it from B opens the valve; reversing the operation closes the valve. 4

These operations may be effected by a control valve which may be of any suitable type,as shown in Fig. 1, it is of the piston type and consists of a cylinder 10 having therein a piston valve 11 provided with a chamber C for alternately connecting the pipes 13 and 14 to the exhaust 15. The pres-- sure fluid is admitted to opposite sides of the piston valve by a pipe 12 connected to a region ofhigh pressure in the main fluid conduit 1. Pipes 13 and 14 lead respectively to the chambers A and B.

The piston rod 16 0f the control valve piston is connected to a lever 17 having one end connected by link 18 to an operating lever 19. The other end of lever 17 is pivoted at 20 to a fixed support.

In order to indicate the position of the plunger, a shaft 22 passes through a tube 30 (see Fig. 2) which extends between the nose 5 and the wall of the casing 3. At the outer end of this tube is mounted a stufling box 31. At its inner end the shaft 22 is provided with a crankarm 23 connected by a link 24 to a pivot 25 on the plunger 7.

At its outer end the shaft 22 carries a pointer 21 arranged to move over a suitable scale 32..

. There is thus provided a simple means for indicating at the exterior of the casing the position of the plunger, the connections being such that no moving parts are located in the Water way, nor is this water way obstructedgto any material extent. As above pointed out, the plunger isforced up to the fully open position of the valve by the passage of pressure water through pipe 13 into the chamber A. As the sliding surfaces of the plunger and cylinder are not packed, it has been found in practice that there is a leakage of water around the upper end of the plunger 7 and a resulting constant flow through the control piping 14 which is objectionable. I provide at the top of the plunger 7 a means for forming awater tight joint between the pper end of the p unger and the cylinder.

In order to avoidthis difficulty l As shown in Fig. 3 this closure may be effected by providing on the top edge of the plunger 7 a ring of ordinary fiat packing 45 which engages an annular flange 416, on the wall of the cylinder, so that when the valve is wide open, it seats at the top, and automatically shuts off all leakage from chamber A through the control piping. Obviously other means of preventing leakage at this point may be used, but the simple form illustrated has in practice been found to work perfectly. I

I claim 1. A valve comprising a generally upright casing, a fixed hollow cylinder supported in and spaced from the casing to form a fluid way, a plunger sliding in the cylinder and cooperating with the casing as a seat, said cylinder and plunger being shaped to form a central and an annularchamber between which and the water way there is communication through which gressure tends to equalize in the fluid way an in said chambers permitting the plunger under gravity to undesignedly seat, and abutment packing means bet-ween the end of the plunger and the cyli'nder for closing said communication when the plunger is at the end of its stroke with the valve in open position, substantially as described.

2. A valve structure comprising a casing having a valve seat on its inner wall a fixed cylinder supported .within and spaced from the wall of said casing, a plunger sliding within said cylinder and having aclosure surface cooperating with said valve seat. and an indicating mechanism comprising a shaft extending through adjacent walls of the casing and the cylinder, a crank arm connerted to the end of the shaft within the cylinder, a link connecting the crank arm to the plunger, and an indicator securedto said shaftoutside the casing.

In testimony whereof I afiix my signature.

RAYMOND D. JOHNSON. 

